What was the dominant law in Xia and Shang Dynasties?

The theocracy thought in Xia and Shang Dynasties is mainly manifested in "destiny" and "heaven punishment".

The development of theocracy in Shang Dynasty: 1. Slave owners in Shang dynasty fabricated many myths about gods' career; 2. Divination was very popular in Shang Dynasty; Slave owners in Shang Dynasty were famous for their superstition of ghosts and gods, and their fate was mysterious, so they fell into business. Yin people fear God and lead the people to serve God.